In 1620 Sor Jerónima de la Asunción (1556-1630) and her cofounders left their cloistered convent in Toledo, Spain, journeying to Mexico to board a Manila galleon on their way to the Philippines. Sor Jerónima is familiar to art historians for her portrait by Velózquez that hangs in the Prado Museum in Madrid. What most people do not know is that one of her travel companions, Sor Ana de Cristo (1565-1636), wrote a long biographical account of Sor Jerónima and their fifteen-month odyssey. Drawing from Sor Ana's manuscript, other archival sources, and rare books, Owens's study offers a fascinating view of travel, evangelization, and empire.